СИСТЕМА СВЯЗУЮЩЕГО ДЛЯ УМЕНЬШЕНИЯ ВЗАИМОДЕЙСТВИЯ МЕТАЛЛА С ФОРМОЙ

Система связующего для огнеупорных материалов, применяемая в процессах литья в песчаные формы, в частности двухкомпонентные системы связующего на основе полиуретана, применяемые в способе изготовления стержней в холодных ящиках или способе с применением холодного отверждения, характеризующиеся более низкой степенью взаимодействия металла с формой. Способ изготовления форм и стержней для литья металла включает этапы: обеспечения системы органического связующего и огнеупорного формовочного материала, при этом система органического связующего представлена в виде трех компонентов, которые не объединяют до момента применения, причем третий компонент содержит по меньшей мере алкилортоформиат; cмешивания по меньшей мере первых двух компонентов системы органического связующего с огнеупорным формовочным материалом с получением формуемой смеси для литейного производства; формования формуемой смеси для литейного производства в форму или стержень и отверждения сформованных формы или стержня. 8 з.п.

ЛИТЕЙНЫЙ ШЛИКЕР

СИСТЕМА СВЯЗУЮЩЕГО ДЛЯ УМЕНЬШЕНИЯ ВЗАИМОДЕЙСТВИЯ МЕТАЛЛА С ФОРМОЙ

IMPROVED POLYURETHANE BINDER COMPOSITIONS

FOUNDRY CASTING FORMS

PREPARATION OF HYDROLYSATES OF ALKYL SILICATES

... 1459786 Organic sificate hydrolysate; silica compositions; refractory compositions ZIRCONAL PROCESSES Ltd 1 Aug 1974 [1 Aug 1973] 36642/73 Headings C1A and C1J [Also in Divisions C3 and C4] A liquid/powder formulation comprises (1) the liquid hydrolysate of an organic silicate prepared by forming a homogeneous mixture of the organic silicate and water and digesting the mixture at an elevated temperature in the absence of an acidic or basic catalyst and (2) a powder insoluble in the liquid hydrolysate dispersed in the preformed liquid hydrolysate. The powder may be a refractory powder (e.g. fused alumina, calcined aluminium silicate, kyanite, corundum, fused mullite grain) or zinc dust. The homogeneous mixture may be formed with a mutual solvent for the organic silicate and water, optionally a lower aliphatic alcohol (including MeOH, EtOH, iso- and n-PrOH, iso- and n- BuOH, 2-ethoxyethanol). The organic silicate may be an alkyl silicate containing only C 1 -C 6 alkyl groups, optionally ethyl ...

PROCESS FOR MANUFACTURE OF MOULDS AND CORES

... 1462366 Foundry moulds DOW CORNING Ltd 18 June 1974 [28 June 1973] 30749/73 Heading C3N A process for the production of a foundry mould or core comprises (A) mixing (i) foundry aggregate, (ii) a phenol-resol resin, a urea furan resin or a mixture of the said resins, (iii) a hardening agent for the resin and (iv) a silane of the general formula RSi(OR1) 3 in which R1 is C 1-4 alkyl or C 2-4 alkoxy and R is or in which Q is -(CH 2 ) 3 -, -(CH 2 ) 4 - or -CH 2 CHCH 3 CH 2 -, and (B) thereafter shaping the mixture and hardening the shaped mixture. The silane may be used in an amount up to 20 parts per 100 parts by weight of resin, but advantageously in an amount 0À05-5%. The aggregate may be quartz, zirconium silicate, alumina, calcined cyanite or silica. Specific silanes used are ...

CERAMIC MOULDING COMPOSITIONS AND THEIR USE IN THE PRODUCTION OF CERAMIC MOULDING STRUCTURES

... 1392013 Refractories DYNAMIT NOBEL AG 1 Feb 1973 [1 Feb 1972] 5202/73 Heading C1J [Also in Division C3] A moulding composition comprises a refractory oxide and a binder of an unhydrolized alcoholate of one or more of Al, Ti, Zr and Hf with a # dicarbonyl compound and/or an OH carboxylic acid or ester and/or a polyol. Specified components are propylate, butylate, acetylacetone, benzoylacetone, dibenzoylmethane, acetoacetic ester, glycolic, lactic and hydroxyproprionic acids, glycols, diglycols glycerol, di- and tri-ethanolamine; the refractories being ZrO 2 , Al 2 O 3 , TiO 2 , MgO, ThO 2 , CaO, BeO and Cr 2 O 3 .

Improvements in refractory mold composition

A refractory mould composition comprises a homogeneous slurry of a refractory aggregate, 15-50% by weight of an aqueous binder containing at least one methyl trialkoxy silane having from 4 to 10 carbon atoms and a hydrolysing agent for the organosilane, and from 0.001 to 0.5% by weight of the composition of a gelling agent for the organosilane wherein not more than 70% by weight of the aggregate has a particle size larger than 100 mesh (Tyler) and at least 20% has a particle size smaller than 200 mesh. Preferably the aqueous binder comprises initially 30-60% by weight of methyl trimethoxy silane, methyl triethoxy silane, methyl triisopropoxy silane or a mixture thereof, which should be completely hydrolysed prior to the admixture of refractory aggregate and gelling agent therewith. The hydrolysing agent may be a mineral acid such as HCl, H2SO4, HNO3, H3PO4 and HF present in amount no more than 0.1% by weight of the aqueous binder. The gelling agent may be an amine or a metal oxide or salt ...

Preparation of condensed isopropyl silicate materials

A condensed isopropyl silicate is made by heating isopropyl orthosilicate containing dissolved HCl at from 40 DEG to 55 DEG C., adding thereto water and, as mutual solvent for the reactants, isopropyl alcohol, the amount of water being from 0.75 to 1 mol per gram atom of Si in the orthosilicate, whereby an exothermic reaction ensues and HCl gas is liberated, refluxing the mixture and distilling off isopropyl alcohol. The isopropyl orthosilicate reactant is suitably the crude product obtained by reaction of SiCl4 and isopropyl alcohol. At least part of the alcohol used may be a product recovered from a previous preparation of a condensed isopropyl silicate, and at least part of the alcohol reacted with SiCl4 may be the product through which has been passed HCl liberated during reaction of SiCl4 with isopropyl alcohol. In a typical example, (1) isopropyl alcohol was slowly added to SiCl4 with subsequent heating of the mixture to 50 DEG C., air being passed therethrough; water and isopropyl ...

Liquid compositions comprising organic titanium compounds

A titanium oxide gel is produced by hydrolysing a mixture of an organic titanium extra Ti(ORX)4, where R is an alkylene group having 2-4 carbon atoms and X is Cl, Br or I, and an amino alcohol N(R1)(R2)(R3). The groups R1, R2, and R3 may be straight chain hydroxyalkyl having 2-5 carbon atoms, or branched chain polyhydroxyalkyl having 4-5 carbon atoms; R1 and R2 may also be hydrogen, or alkyl or aminoalkyl having 1-5 carbon atoms. At least 1/n moles amino alcohol are used per mole of Ti ester, where n is the number of R1, R2 and R3 groups which are hydroxyalkyl. Preferred reagents are titanium tetrabetachloroethoxide, and mono-, di-, or tri-ethanolamine, N-methyl ethanolamine, N-(2-aminoethyl) ethanolamine, or 2-amino-2-ethyl propan-1,3-diol. Hydrolysis may be effected by adding water to the mixture, alone or diluted with e.g. methanol, ethanol, n- and iso-propanol; these solvents may also be included in the mixture. Refractory articles are produced by adding refractory powder, e.g. zircon ...

VERFAHREN ZUR HERSTELLUNG EINES SCHAUMBETONS

Material composition and method for its manufacture

HYBRID BINDER HAVING REDUCED ORGANIC SOLVENT CONTENT FOR USE IN REFRACTORY MOULDS

PREPARATION OF SHELL MOLDS ADAPTED FOR PRECISION CASTING

POLYURETHANE BINDER COMPOSITIONS AND POLYISOCYANATE COMPOSITIONS USEFUL FOR POLYURETHANE BINDERS

TITANIC ACID ESTER-CONTAINING BINDER FOR COATING MATERIALS AND REFRACTORY SHAPED BODIES AS WELL AS PROCESS FOR THE PRODUCTION OF THESE BINDERS

HYBRID BINDER FOR PRODUCING CERAMIC MOLDS AND METHOD OF BINDER MANUFACTURE

Procédé pour la fabrication d'un moule réfractaire.

Procédé de préparation de pièces réfractaires.

Procédé pour la confection de moules et de noyaux pour la coulée des métaux.

Composition destinée notamment à la confection de produits réfractaires et de moules de précision.

Utilisation du titanate de butyle comme liant pour réfractaire

Verfahren zur Herstellung einer Giessform für Metallguss

Verfahren zur Herstellung von Giessformen

Verfahren zur Herstellung einer Giessereiformmasse, die mit Modellwerkstoffen, insbesondere Harnstoff, in Berührung kommt, welche einen pH-Wert über 6 aufweisen

Verfahren zum Binden körnigen feuerfesten Materials

Verfahren zur Herstellung von Giessereiformmassen

Verfahren zur Herstellung von Präzisionsgussformen

Silane and formaldehyde resin cold setting - binder for foundry cores and moulds

Cold-setting binder for casting cores and moulds, pref. prepared by mixing binder with foundry sand and acid hardener, shaping and allowing to set, contains (I) a Si-Free cold-setting synthetic resin, pref. condensate(s) of HCHO and phenol and/or urea and/or melamine, and (II) a silane R'Si(OR)3 (where R is (m)ethyl and R' is an epoxy gp-contg. organic residue), pref. (II) concn. being 0.01 - 3 (0.05 - 2) wt. % based on wt. of binder and 0.0001 - 0.1 (0.0002 - 0.06) wt.% based on wt. of article. Pref. one C atom of R' is linket to Si; R' consists only of C, H and O; is free from olefinic double bonds and from triple bonds; and contains 3-6 C. Pref. all R gps. are methyl.

Verfahren zur Herstellung einer metallurgisch reaktionsträgen Giessform

Verfahren zur Herstellung einer Mischung aus feuerfesten Materialteilchen und einem Bindemittel aus sauer hydrolysiertem Alkylsilikat

Procédé pour la réalisation de moules utilisés pour la fabrication de noyaux de fonderie

Ceramic mould compsn - for precision-casting of metals

Compsn comprises >=30 wt.% of zirconium silicate and max. 70 wt.% of another refractory material (pref. mullite, alumina and/or magnesite); the binder is an aminoalkyl silicate diluted with an alcohol -water mixture. The granular compsn (essential for good casting props) is 0.9-1.5 wt.% of grains >=63 mu, 49-55 wt,% of 20-63 mu grains, 17-25 wt.% of 6.3-20 mu grains, 9-15 wt.% of 2.0-6.3 mu grains, and 4-8 wt.% of grains 2.0 mu. The moulds are formed by casting. The ceramic components do not evolve any gases during the firing so that the mass is not porous and the casting surface is defect-free.

Procédé de préparation d'une composition réticulable à base de silicone

Kieselsäurehaltiges Bindemittel

Moule pour le moulage de métaux fondus réactifs et réfractaires

Compositions containing silicone and their applications

BINDING AGENTS

Improvements with the moulds intended for run metals, and their manufactoring process

CASTING OF HIGH MELTING POINT METALS AND CORES THEREFOR

PROCEDE POUR LA PREPARATION DE NOYAUX DE FONDERIE ET COMPOSITION CERAMIQUE UTILISABLE POUR LA MISE EN OEUVRE DUDIT PROCEDE

LE PROCEDE EN VUE DE LA PREPARATION DE NOYAUX DE FONDERIE CONSISTE A PORTER A UNE TEMPERATURE COMPRISE ENTRE 50C ET 150C UN MELANGE COMPORTANT UNE CHARGE CERAMIQUE DE SILICE FONDUE ET ZIRCON EN PROPORTIONS MASSIQUES RESPECTIVES DE 60 A 80 ET 40 A 20 ET POUR 100 PARTIES DE CHARGE, EN POIDS, 2 A 8 PARTIES DE RESINE SILICONE ET 10 A 20 PARTIES DE PLASTIFIANT, LADITE RESINE ETANT AINSI MAINTENUE A L'ETAT PLASTIQUE, NON RETICULE PUIS A INJECTER LE MELANGE DANS UN MOULE FROID OU LA RESINE SE SOLIDIFIE A MOINS DE 50C ET ENFIN, APRES DEMOULAGE, A OPERER UNE CUISSON DE L'OBJET EN FORME DE NOYAU AVEC UN PALIER VERS 10001200C DE FACON A TRANSFORMER LA RESINE EN PRODUIT SILICEUX. LES MELANGES UTILISES PEUVENT EGALEMENT COMPORTER UNE HUILE SILICONEE ET UN AGENT DE DEMOULAGE.

COMPOSITION DE LIANT REFRACTAIRE ET SON PROCEDE D'OBTENTION

L'INVENTION CONCERNE UNE COMPOSITION DE LIANT REFRACTAIRE DESTINEE A LA CONFECTION DE MOULES OU AUTRES DISPOSITIFS REFRACTAIRES. LADITE COMPOSITION COMPREND DE LA SILICE COLLOIDALE, UNE MATIERE LIQUIDE CONTENANT DES GROUPES SI-OH, UN SOLVANT APTE A SOLUBILISER LA MATIERE LIQUIDE ET LA SILICE COLLOIDALE, ET AU MOINS UN COMPOSE ORGANIQUE NON METALLIQUE, NON IONIQUE, APROTIQUE QUI CONTIENT AU MOINS UN ELEMENT CHOISI PARMI A, S, B ET N ET QUI STABILISE LA COMPOSITION A L'ENCONTRE D'UNE AUTO-GELIFICATION, LA COMPOSITION POUVANT ETRE GELIFIEE A LA DEMANDE EN UNE SEULE PHASE. APPLICATION EN PARTICULIER A L'OBTENTION DE PIECES METALLIQUES COULEES.

CERAMIC MOULDING COMPOSITIONS AND THEIR USE IN THE PRODUCTION OF CERAMIC MOULDING STRUCTURES

Self-curing foundry moulding sand - contg. phenol-aldehyde binder, acid, and phenoxy-alkyl-alkoxy-silane curing agent

Inorganic-organic composition

Products containing silica grounds

Method for [...] of particulate solid material.

FOUNDRY BINDER SYSTEMS WHICH CONTAIN A SILANE-MODIFIED POLYISOCYANATE

The invention relates to phenolic-urethane foundry binder systems containing a silane-modified polyisocyanate. The silane-modified polyisocyanates are prepared by reacting a polyisocyanate with an organosilane. The foundry binders are used to make foundry shapes, which are used to cast metal parts.

Binding agents prepared from resins containing adhesivizing agents of long shelf life

A binding agent comprising a hardenable resin and aminosilane is described wherein the aminosilane is alkylated on the nitrogen and/or on the silicon atom.

BINDER FOR MANUFACTURING PRECISION CASTING MOLD

PURPOSE: To obtain a casting mold which has a specified curing rate, improves the stability thereof and maintains the consistent quality during the long-period use by incorporating specific components into a binder for manufacturing a precision casting mold. CONSTITUTION: Alkyl silicate and titanium, zirconium, tin or aminoalkoxide of aluminum or the mixture composed thereof are incorporated into the binder. The ratio of the alkyl silicate and the aminoalkoxide of the metal is specified to the ratio at which the basis nitrogen atom of the aminoalkoxide of the metal with respect 1mol silicon atom of the alkyl silicate attains 0.01W1.0mol. Substantial drying and curing are therein induced while the moisture in the air is absorbed in the stage of forming a coating layer on the pattern surface. The strength of the cured body thereof is high to facilitate the removal of the pattern. COPYRIGHT: (C)1988,JPO&Japio ...

FEUERFESTER SCHICHTSTOFF UND VERFAHREN ZU SEINER HERSTELLUNG

Bindemittel fuer Formmassen

Profilverbindung

Die Erfindung betrifft eine Profilverbindung, umfassend einen ersten Profilstab (1) mit mindestens einer sich in Richtung der Längserstreckung des ersten Profilstabs (1) erstreckenden, hinterschnittenen ersten Profilnut (2) und eine in die erste Profilnut (2) verschraubte Gewindehülse (5, 9), aufweisend ein Außengewinde (6), eine sich parallel zu der ersten Profilnut (2) erstreckende Durchgangsöffnung (25) mit Innengewinde (24) sowie Antriebsmittel (7) zum Verdrehen der Gewindehülse (5, 9), wobei in der Gewindehülse (5, 9), eine ein Schraubengewinde (18) aufweisende Verbindungsschraube (17) aufgenommen ist. Erfindungsgemäß ist vorgesehen, dass die Antriebsmittel (7) sich bis zu beiden, voneinander abgewandten axialen Enden der Gewindehülse (5, 9), erstrecken, dass das Außengewinde (6) als spanabhebendes, selbstschneidendes Gewinde zur Ausbildung eines Gewindes in der ersten Profilnut (2) zum Halten der Gewindehülse (5, 9), ausgebildet ist.

Form- und UEberzugsmassen

Bindemittel fuer Giessereiformmassen

Method of producing foundry moulding compositions

A method of making a water-stable foundry moulding composition comprises a primary stage of converting by acid hydrolysis a silicic ester to silicic acid, a secondary stage of adding an additional ester, which is more readily hydrolysable than the first, to the silicic acid obtained in the primary stage, water in the primary silicic acid serving to hydrolyse the additional ester to form high molecular complex substantially water-insoluble silicic acid, and mixing the said complex silicic acid with a refractory moulding material. In examples the first ester is ethyl silicate and the second methyl silicate titanic acid ester or orthy-ethyl silicate. Ethyl, butyl isopropyl, or propyl alcohol are added at the primary stage. Refractories used are zirconium silicate, sillimanite or mulltite.

Production of refractory objects

In examples, a refractory powder consisting of a mixture of zircon and calcined kaolin was mixed with a binder consisting of an aqueous isopropanol solution of isopropyl polysilicate and, as hydrolysis and gellatron accelerator, an isopropanol solution of piperidine (Example 8), or the 1 :2-butylene oxidetetra-(2-aminoethoxy)silan reaction product (Example 9). The resulting mixtures were cast in crucible moulds, left for several hours, and the castings so obtained were removed and fired at 1100 DEG C. for 8 hours. Specification 948,133 is referred to.ALSO:A binder composition for mixing with refractory powder in the production of refractory objects, comprises an isopropyl silicate and a base which acts as hydrolysis and gelation accelerator when diluted with water. The silicate is preferably an isopropyl polysilicate containing, for example, about 10% of the orthosilicate. Bases specified are piperidine, isopropylamine, mono- and tri-ethanolamines, n- and sec - butylamines, di - n - butyl ...

Improvements relating to processes for binding particulate solid materials

A composition is made by mixing a particulate refractory material, e.g. sillimanite, fire clay grogs, calcined kaolin, silica, crystobalite, quartz and alumina, with a solution of an acid-hydrolysed isopropyl silicate prepared e.g. by the processes described and claimed in Specifications 948,136 and 948,137, The hydrolysed solution may be made by adding the silicate to a mixture of water and acid, e.g. HCl or H2SO4, and preferably also containing a mutual solvent for the water and silicate. Examples 1 to 12 describe the preparation of isopropyl silicates; Examples 13 to 21 describe the preparation of the acid-hydrolysed silicate solutions; Examples 22 to 24 describe the preparation of the refractory mixes; and Examples 25 to 27 describe the use of the solutions for binding refractory materials.

REFRACTORY LAMINATE COMPOSITION

Process for making foundry sand mold

BINDING OF REFRACTORY MATERIALS

PARTICULATE MATERIAL FOR FORMING MOULDS AND METHOD FOR PRODUCING SAME

IMPROVEMENTS IN OR RELATING TO COMPOSITIONS CONTAINING HYDROCARBONETHER POLYSILICATES

... 1292938 Alkoxyalkyl polysilicate compositions; foundry mould compositions ANDERSON DEVELOPMENT CO 19 April 1971 [25 Sept 1970] 22521/71 Headings C3N and C3T [Also in Division B2] A liquid composition comprises (1) at least 30 wt. per cent of a liquid organic polysilicate in which at least 50% of the number of organic groups are ROCH 2 CH 2 O- or ROCH 2 CH 2 OCH 2 CH 2 O- groups, R being a C 1-12 hydrocarbon group free of aliphatic unsaturation, any other organic groups being C 1-4 alkyl groups, and the SiO 2 content of the polysilicate being at least 19 wt. per cent, and optionally (2)-water and/or (3) an organic solvent, in which any alcohol or glycol ether present is such that the total number of alkoxy and glycol ether residues in (1) plus (3) contains at least 50% glycol ether groups as specified above, the SiO 2 content of the total composition (1) plus (2) plus (3) being 6-22 wt. per cent. Preferably, the composition has pH not above 6. There may be mixed with the liquid composition ...

MANUFACTURE OF FOUNDRY MOULDS AND CORES

... 1413027 Foundry sand TSENTRALNY NAUCHNO - ISSLEDOVATELSKY INSTITUT TEKHNOLOGII MASHINOSTROENIA 4 Sept 1973 41593/73 Heading C3N A foundry moulding mixture comprises sand, a phenol, aldehyde resin binder, an acid catalyst, and a phenoxyalkylalkoxysilane, e.g. in an amount 0À1-1% by weight of the resin, having the formula wherein X is H, alkyl, alkoxy or -O(CH 2 ) n Si(OR) 3 where n is 2 or 3 and R is C 1-4 alkyl. Suitable phenoxyalkylalkoxysilanes are -phenoxypropyltriethoxysilane, - orthomethylphenoxypropyltriethoxysilane, - ortho - ethoxyphenoxypropyltriethoxysilane and di - - triethoxysilylpropyl resorcinol ether. The resin binder may be a phenol formaldehyde, resorcinol formaldehyde, phenol furfural or furyl phenol formaldehyde synthetic resin. The acid catalyst may be p-toluenesulphonic acid, benzenesulphonic acid or p-chlorobenzenesulphonic acid. The silane may be added into the resin at ambient temperature or preheated to 50- 60‹ C. The sand may contain up to 0À5% by weight of clay ...

Process for the production of precision casting moulds

... 1,119,223. Refractory precision casting mould. DYNAMIT NOBEL A.G. 8 July, 1965 [9 July, 1964], No. 29082/65. Heading B5A. A precision casting mould is produced by forming a shell of the required shape from refractory material by applying, e.g. by dipping or spraying, to an expendable pattern e.g. of wax, urea, polystyrene, a suspension of the refractory material in a liquid binder so as to form a coating thereon, and removing the pattern from the refractory coating e.g. by melting, dissolving or burning it, and firing the shell obtained at a high temperature e.g. #1000‹ C., the liquid binder comprising a condensed mixed metal alcoholate containing at least two of the elements boron, aluminium silicon, tin, lead, titanium, zirconium. The binder may be liquid or dissolved in an organic solvent, and may be partially hydrolysed. It is preferably derived from an alcohol or a mixture of alcohols having 1-4 carbon atoms, and preferably also contains a titanium alcoholate and/or a silicon alcoholate ...

A process for the manufacture of foundry cores comprising silane-modified synthetic resin binders

... 1,143,351. Casting moulds for metals. ASHLAND OIL & REFINING CO. 21 June, 1966 [26 June, 1965], No. 27644/66. Heading C3R. A binder for use in foundry moulds comprises an acid-hardenable furan-, phenol-, urea- or melamine-aldehyde resin or a mixture thereof and a silane R1-Si(OR 3 ), wherein R1 is a C 1-6 alkyl radical containing a group capable of reaction with the resin and the groups R are each C 1-6 alkyl or C 1-6 alkoxy-C 1-6 alkyl radicals. The silane may amount to 0À1-3À0 wt. per cent of the resin, and the binder may amount to 0À5-3À0 wt. per cent of the aggregate with which it is mixed to give a foundry mix. In examples, the resins used are a phenolformaldehyde resin (1: 1À2 molar ratio, Mg(OH) 2 catalysed) and a furfuryl alcohol/urea/formaldehvde resin, the silane is NH 2 -(CH 2 ) 2 -NH-(CH 2 ) 3 -Si(OCH 3 ) or NH 2 -(CH 2 ) 3 -Si(OC 2 H 5 ) 3 , the aggregate is quartz sand, and the hardener is 60% aqueous p-toluenesulphonic acid or 75% H 3 PO 4 .

Procedure for the production of Präzisionsgsußformen

PROCEDURE FOR THE PRODUCTION OF A FOAMED CONCRETE

BINDER SYSTEM, NUCLEAR AND MIXTURE AND PROCEDURE FOR ITS PRODUCTION

PROCEDURE FOR THE PRODUCTION OF ORGANIC-INORGANIC PLASTICS

PROCEDURE FOR THE PRODUCTION OF A FOAMED CONCRETE

UREIDOFUNCTIONAL ORGANOSILONES

BINDER COMPOSITIONS

Polyurethane forming no-bake foundry binders

BINDER COMPOSITIONS

SUBSTITUTED ALUMINIUM ALKOXIDES

BINDER COMPOSITIONS

CASTING SLURRY

Barbotine de fonderie pour la fabrication de moules carapaces, comprenant des particules de poudre et un liant, caractérisée en ce qu'elle comprend un tensioactif. Utilisation d'une telle barbotine de fonderie pour la fabrication d'un moule carapace.

METHOD OF CASTING METALS

SYSTEM OF BINDING SUBSTANCES COLD-BOX AND MIXTURE FOR USE IN SYSTEMS SUCH AS ADDITIVES FOR BINDING SUBSTANCES

Описана смесь, получаемая преобразованием предварительной смеси (av) метансульфоновой кислоты (bv) одного или нескольких сложных эфиров одной или нескольких кислородных кислот фосфора и (cv) одного или нескольких силанов. Кроме того, изобретение относится к применению упомянутой смеси в качестве добавки для полиизоцианатного компонента двухкомпонентной системы связующих веществ для получения полиуретановой смолы. Далее, данное изобретение относится к содержащему полиизоцианат раствору для применения в качестве компонента системы формовочных и связующих веществ, а также применению содержащего полиизоцианат раствора в качестве полиизоцианатного компонента двухкомпонентной системы связующих веществ для получения полиуретановой смолы и к соответствующей двухкомпонентной системе связующих веществ для получения полиуретановой смолы. A mixture obtained by converting a preliminary mixture (av) of methanesulfonic acid (bv) of one or several esters of one or several oxygen acids of phosphorus and (cv) of one or several silanes is described. In addition, the invention relates to the use of the above mixture as an additive for the polyisocyanate component of a two-component binder system for the preparation of a polyurethane resin. Further, this invention relates to a solution containing a polyisocyanate for use as a component of a molding and binder system, as well as a solution containing a polyisocyanate as a polyisocyanate component of a two-component binder system for producing a polyurethane resin and to a corresponding two-component binder system for producing a polyurethane resin.

CASTING OF HIGH MELTING POINT METALS AND CORES THEREFOR

Liquid compositions including/understanding of the organic compounds of titanium

Materials for moulding in carapace

AMELIORATIONS APPORTEES A LA LIAISON DE MATERIAUX REFRACTAIRES

Procédé consistant à rendre hydrolysable une substance pour obtenir un hydrolysat utilement gélifialable. Ce procédé comprend l'opération d'éthérification consistant à implanter des groupes alkoxy sur la surface de cette substance. Application à la fabrication d'objets réfractaires façonnés ayant une bonne résistance aux chocs thermiques.

SILICA-METAL OXIDE CO-GELS

Manufactoring process of a mould of foundry resisting the metallurgical reactions

INORGANIC-ORGANIC PLASTICS

FOUNDRY CASTING FORMS

COMPOSITION OF MOLDING, PROCESS TO MOLD ARTICLES, MOLDED ARTICLE AND PROCESS TO PREPARE CONFORMED PRODUCTS OF CASTING

BINDER SYSTEM FOR REDUCED METAL MOLD REACTION

A binder system for refractory materials used in sand casting processes, especially two-part polyurethane-based binder systems used in the cold box or no bake process, has less metal-mold reaction when a separate third part is used. The third part is an alkyl silicate, such as tetraethyl orthosilicate (“TEOS”), an alkyl orthoformate, such as trimethyl orthoformate (TMOF) or triethyl orthoformate (TEOF), or combinations thereof. 1. A method for reducing metal-mold reaction in a metal casting process , comprising the steps of:providing an organic binder system and a refractory molding material, the organic binder system provided as three components that are not combined until the time of use, the third component comprising at least one of: an alkyl silicate and an alkyl orthoformate;mixing at least the first two components of the organic binder system with the refractory molding material to provide a shapeable foundry mix;forming the shapeable foundry mix into a mold or core; andcuring the mold or core formed.2. The method of claim 1 , wherein all three components of the organic binder system are combined prior to being mixed with the refractory molding material.3. The method of claim 1 , wherein only the first and second components of the organic binder system are combined prior to being mixed with the refractory molding material.4. The method of claim 3 , wherein the third component of the organic binder system is applied to the formed mold or core.5. The method of claim 4 , wherein the third component is applied by spraying the third component only onto surfaces of the mold or core that will be exposed to molten metal during the metal casting process.6. The method of claim 1 , wherein:the first component is a polyol component, comprising a phenolic base resin with at least 2 hydroxy groups per molecule, the polyol component being devoid of polyisocyanates; andthe second component is a polyisocyanate component, comprising a polyisocyanate compound with at least 2 ...

FOUNDRY MIX INCLUDING RESORCINOL

A foundry mix includes a major amount of a foundry aggregate and an effective binding amount of a binder system. The binder system cures in the presence of sulfur dioxide and a free radical initiator. The binder system may include (1) 10 to 70 parts by weight of an epoxy novolac resin; (2) 0.5 to 10 parts by weight of resorcinol; (3) 20 to 70 parts by weight of a monomeric or polymeric acrylate; and (4) an effective amount of a free radical initiator. Notably, (1), (2), (3) and (4) are separate components or mixed with another of said components, provided (4) is not mixed with (3), where said parts by weight are based upon 100 parts of the binder system. 1. A foundry binder system including:an aggregate;a first portion (Part One), wherein Part One includes an epoxy resin in a range from 25 to 70 parts by weight, and cumene hydroperoxide in a range from 10 to 40 parts by weight;a second portion (Part Two), wherein Part Two includes an epoxy novolac resin in a range from 10 to 40 parts by weight, polyhydroxy benzene in a range from 0.5 to 10 parts by weight, an acrylate in a range from 20 to 70 parts by weight; andwherein the aggregate, Part One, and Part Two are mixed together and exposed to sulfur dioxide to cure the aggregate into a foundry mold.2. The foundry binder system of claim 1 , wherein the polyhydroxy benzene is one of a resorcinol claim 1 , a non-functionalized resorcinol compound claim 1 , and a functionalized resorcinol compound.3. The foundry binder system of claim 2 , wherein the epoxy resin in Part One includes at least 65 parts by weight of bisphenol F and less than 5 parts by weight of bisphenol A.4. The foundry binder system of claim 3 , wherein the epoxy resin in Part One has about 1 parts by weight of bisphenol A and about 69 parts by weight bisphenol F.5. The foundry binder system of claim 2 , wherein Part Two further includes dibasic ester in a range from 2 to 10 parts by weight.6. The foundry binder system of claim 2 , wherein Part Two ...

FOUNDRY MIX INCLUDING RESORCINOL

A foundry mix includes a major amount of a foundry aggregate and an effective binding amount of a binder system. The binder system cures in the presence of sulfur dioxide and a free radical initiator. The binder system may include (1) 10 to 70 parts by weight of an epoxy novolac resin; (2) 0.5 to 10 parts by weight of resorcinol; (3) 20 to 70 parts by weight of a monomeric or polymeric acrylate; and (4) an effective amount of a free radical initiator. Notably, (1), (2), (3) and (4) are separate components or mixed with another of said components, provided (4) is not mixed with (3), where said parts by weight are based upon 100 parts of the binder system. 1. A method of casting a metal article comprising: wherein the foundry mix includes:', 'a first portion (Part One), wherein Part One includes an epoxy resin in a range from 25 to 70 parts by weight and a free radical initiator;', 'a second portion (Part Two), wherein Part Two includes an epoxy novolac resin in a range from 10 to 40 parts by weight, a polyhydroxy benezene in a range from 0.5 to 10 parts by weight, an acrylate in a range from 20 to 70 parts by weight and a diabasic ester in a range of 2 to 10 parts by weight;, 'fabricating a foundry shape by introducing a foundry mix into a pattern to form the foundry shape;'}provided Part One is not mixed with Part Two prior to or simultaneous to fabricating the foundry shape the foundry mix, and where said parts by weight are based upon 100 parts of the foundry mix;curing the shape with gaseous sulfur dioxide;pouring metal while in a liquid state into the foundry shape;allowing the metal to cool and solidify; andseparating the fabricated shape from the pattern.2. The method of claim 1 , wherein the amount of free radical initiator is between 10-40 parts by weight.3. The method of claim 2 , wherein the free radical initiator is cumene hydroperoxide.4. The method of claim 1 , wherein the epoxy resin of Part One is a Bisphenol F epoxy resin.5. The method of claim 4 , ...

CASTING SLURRY

A casting slurry for the manufacture of shell molds, including powder particles and a binder, further including a surfactant. Use of such a casting slurry for the manufacture of a shell mold. 1. A casting slurry for manufacturing shell molds , comprising powder particles , a binder and a hiding power stabilizing surfactant , the mass content of said surfactant in the slurry being less than 0.1%.2. The casting slurry as claimed in claim 1 , wherein the surfactant has a carbon chain comprising at most four thousand eight hundred carbon atoms.3. The casting slurry as claimed in claim 1 , wherein the surfactant leaves the pH of the slurry unchanged to within 5%.4. The casting slurry as claimed in claim 1 , wherein the surfactant is Tiron CHNaOS.5. The casting slurry as claimed in claim 1 , wherein the surfactant is sodium polyacrylate.6. The casting slurry as claimed in claim 1 , wherein the binder is selected from: ethyl silicate claim 1 , sodium silicate or colloids.7. The casting slurry as claimed in claim 1 , wherein the mass content of the surfactant in the slurry is less than or equal to 0.05%.8. The casting slurry as claimed in claim 1 , the slurry being a contact slurry configured to come in contact with a part pattern.9. The casting slurry as claimed in claim 1 , wherein the powder particles comprise at least one of alumina claim 1 , mullite claim 1 , zirconia claim 1 , mullite-zirconia composites.10. A method of manufacturing a shell mold claim 1 , comprising using a casting slurry as claimed in .11. The casting slurry as claimed in claim 6 , wherein the colloids include colloidal silica claim 6 , colloidal alumina claim 6 , colloidal yttria or colloidal zirconia. The present disclosure relates to the field of the casting, in particular the lost-wax casting processes, and more particularly the slurries used in such processes, especially for the manufacture of casting shell molds.Casting processes known as lost-wax or lost-pattern casting have been known, in ...

METHOD OF PRODUCING MOLDS AND CORES SUITABLE FOR PRODUCING FIBER COMPOSITE BODIES OR CAST PARTS IN METAL OR PLASTIC, MOLD BASE MATERIAL AND BINDER USED IN THE METHOD AND MOLDS AND CORES PRODUCED ACCORDING TO THE METHOD

A method of manufacturing molds and cores suitable for producing fiber composite bodies or cast parts of metal or plastic from a mold base material and a multicomponent binder by 3D printing includes pretreating the particulate mold base material with at least one silicon-organic compound having a polar hydrophilic end and a nonpolar hydrophobic end, forming a layer of the pretreated particulate mold base material, and applying the binder or at least one component of the binder in liquid form to the layer, wherein b. and c. are repeated. 113-. (canceled)15. The method as claimed in claim 14 , further comprising at least one of:the mold base material comprises a particulate material to whose surface the hydrophilic end of the silicon-organic compound is able to attach.the mold base material comprises at least one water-insoluble, inorganic material,the at least one water-insoluble inorganic material is selected from the group consisting of sand, glass, oxidic, ceramic and glass-ceramic materials, and mixtures thereof,the mold base material comprises at least one water-soluble, inorganic material,the at least one water-soluble inorganic material is a water-soluble salt,the mold base material comprises at least one water-soluble, organic material,the at least one water-soluble organic material is a water-soluble polymer or a salt of an organic acid, or a mixture thereof,the particulate mold base material has a mean particle diameter (d50) of 10 μm to 800 μm, and{'sup': 2', '2, 'the particulate mold base material has a surface area as determined to DIN-ISO 9277 of 50 cm/g to 500 cm/g.'}17. The method as claimed in claim 14 , further comprising:for the pretreatment, the silicon-organic compound is added to the particulate mold base material in the pretreatment in an amount such that it is present in the pretreated mold base material in a weight fraction of at least 0.01 wt % and of at most 0.2 wt % based on the dry weight of the pretreated mold base material.18. The ...

Silica-metal oxide co-gels

1356248 Silica-metal oxide cogels; metal silicate gels ZIRCONAL PROCESSES Ltd 21 Oct 1971 [5 Nov 1970] 52694/70 Headings C1A and C1J An acid hydrolysate of an organic silicate is prepared by hydrolysing the organic silicate with an acidic aqueous solution of a soluble salt (e.g. chloride) of the alkaline earth metals, zinc, aluminium, zirconium or chromium, no metallic compounds being precipitated during hydrolysis. The hydrolysate may be gelled by the action of an alkaline medium or by leaving to stand (Examples 3 and 6). The gel may be a silicametal oxide cogel or a metal silicate gel. The silicates may be C 1 -C 6 alkyl orthosilicates, polysilicates or ethyl silicate (a mixture of ethyl orthosilicate and ethyl polysilicate). The gelling may be carried out by the action of aqueous ammonia (Example 1), an aqueous suspension of alkaline earth metal oxide, e.g. MgO (Example 2) an aqueous solution of ammonium acetate (Examples 6, 7, 8 and 9) or the same solution containing NH 3 (Examples 4 and 5). The aqueous solvent may contain a water miscible monohydric alcohol and a strong non-oxidizing acid. In Example I MgCl 2 (10 g) was dissolved in N-hydrochloric acid (40 ml.) then ethyl alcohol (220 ml.) and ethyl silicate (160 ml.) were added. The mixture was gelled by aqueous ammonia. In Example IX hydrated magnesium acetate is used for preparing the mixed silica and magnesia gel. Examples II, III, IV, V, VI and VII illustrate the preparation of gels formed from silica and alumina, silica and zirconia, silica and calcium oxide, silica and chromium oxide, silica and zinc oxide using the respective metal chlorides (oxychloride in the case of zirconium). Refractory compositions, wherein the silica gel is used as a binder may be made from aluminium oxide or silicate, zirconium oxide, zircon, crystalline silicon oxide, silicon carbide, spinel, magnesite, or chrome magnesite. Examples I and VIII exemplify the preparation of sillimanite compositions, Examples VI an alumina ...

Mixed gels composed of silicon dioxide and metal oxides and methods of making them

Foam-concrete mixture

1436522 Cementitious compositions BAYER AG 1 March 1974 [2 March 1973] 9320/74 Heading C1H [Also in Division C3] Foam concrete is produced from a mixture comprising 10-80% by weight of aqueous alkali metal or ammonium silicate solution, 10-80% of organic polyisocyanate and 10-80% of a water-binding substance such as Portland cement, lime, blast furnace cement, pozzolana cement, gypsum, synthetic anhydrite, or quick setting cement. Extensive lists are given of suitable polyisocyanates, surfactants, foam stabilizers, set retarders, volatile liquids or metals as blowing agents, organic and inorganic phosphates as flame retardants. In examples the polyisocyanates used are sulphonated polyphenyl - polymethylene - polyisocyanate and a residue from the distillation of tolylene diisocyanate; triethylamine and N,N,N-(#-dimethylamino-n-propyl) hexahydrotriazine can be used as catalysts; other components included in the compositions listed in the examples are trichloromethane as blowing agent, sodium salt of sulphochlorinated C 10-14 paraffin mixture as emulsifier, perchlorinated paraffin, potassium sulphate, glass fibres, tris-(chloro-ethyl)phosphate and aqueous sodium silicate.

profile connection

Profilverbindung, umfassend einen ersten Profilstab (1) mit mindestens einer sich in Richtung der Längserstreckung des ersten Profilstabs (1) erstreckenden, hinterschnittenen ersten Profilnut (2) und eine in die erste Profilnut (2) verschraubte Gewindehülse (5, 9), aufweisend ein Außengewinde (6), eine sich parallel zu der ersten Profilnut (2) erstreckende Durchgangsöffnung (25) mit Innengewinde (24) sowie Antriebsmittel (7) zum Verdrehen der Gewindehülse (5, 9), wobei in der Gewindehülse (5, 9) eine ein Schraubengewinde (18) aufweisende Verbindungsschraube (17) aufgenommen ist, dadurch gekennzeichnet, dass die Antriebsmittel (7) sich bis zu beiden, voneinander abgewandten axialen Enden der Gewindehülse (5, 9) erstrecken, dass das Außengewinde (6) als spanabhebendes, selbstschneidendes Gewinde zur Ausbildung eines Gewindes in der ersten Profilnut (2) zum Halten der Gewindehülse (5, 9) ausgebildet ist. Profile connection, comprising a first profiled bar (1) with at least one in the direction of the longitudinal extent of the first profiled bar (1) extending, undercut first profiled groove (2) and in the first profiled groove (2) screwed threaded sleeve (5, 9), comprising a External thread (6), a parallel to the first profile groove (2) extending through hole (25) with internal thread (24) and drive means (7) for rotating the threaded sleeve (5, 9), wherein in the threaded sleeve (5, 9) a a screw thread (18) having connecting screw (17) is added, characterized in that the drive means (7) extend to both, opposite axial ends of the threaded sleeve (5, 9) that the external thread (6) as a cutting, self-tapping Thread for forming a thread in the first profile groove (2) for holding the threaded sleeve (5, 9) is formed.

Method for producing a casting molds and cores suitable for the manufacture of fiber composite materials or molded parts made of metal or polymer material, molding material and binder used in the method as well as molds and cores made by this method

FIELD: foundry. SUBSTANCE: invention relates to the field of foundry. A method for the manufacture of casting molds and cores suitable for the manufacture of products from fibrous composite materials or cast parts from metal or polymer material by means of 3D printing includes forming a layer of pre-treated granular molding material, applying a binder or at least one component to this layer a binder in liquid form; and multiple repetition of the steps of forming a layer of granular molding material and applying a binder thereon. The particulate molding material is pretreated with at least one organosilicon compound that contains a polar hydrophilic end and a non-polar hydrophobic end. EFFECT: dimensional accuracy of the manufactured forms and cores is ensured by eliminating the migration of the binder during their manufacture. 13 cl, 5 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 762 467 C1 (51) МПК B22C 1/02 (2006.01) B22C 9/00 (2006.01) B33Y 70/10 (2020.01) B33Y 40/10 (2020.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК B22C 1/02 (2021.05); B22C 9/00 (2021.05); B33Y 70/10 (2021.05); B33Y 40/10 (2021.05) (21)(22) Заявка: 2020126251, 07.01.2019 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): РАЙНЗИХТ ГМБХ (DE) Дата регистрации: 21.12.2021 Приоритет(ы): (30) Конвенционный приоритет: 15.01.2018 DE 10 2018 200 607.5 (45) Опубликовано: 21.12.2021 Бюл. № 36 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 17.08.2020 (86) Заявка PCT: 2 7 6 2 4 6 7 R U (87) Публикация заявки PCT: WO 2019/137871 (18.07.2019) C 1 C 1 EP 2019/050233 (07.01.2019) 2 7 6 2 4 6 7 (56) Список документов, цитированных в отчете о поиске: US 20050276976 A1, 15.12.2005. EP 1594679 A2, 16.11.2005. DE 102007063552 A1, 25.06.2009. SU 835596 A1, 07.06.1981. SU 1172146 A1, 30.11.1987. RU 2214314 C1, 20.10.2003. R U 07.01.2019 (72) Автор(ы): ГЕРЦОГ, Ифо (DE) Адрес для переписки: 197101, Санкт-Петербург, а/я 128, ...

A Mold and A Mold Manufacturing Method

본 발명은 주형 및 주형 제조 방법에 관한 것으로, 본 발명에 의한 주형 제조 방법은, 규산염 또는 폴리실록산 화합물 중 어느 하나 이상을 전구체로 하는 제 1단계와, 알콜용제를 이용하여 상기 전구체를 금속 알콕사이드 화합물과 혼합하는 제 2단계와, 상기 혼합물을 모재에 침지하는 제 3단계; 그리고, 건조시키는 제 4단계를 포함하여 구성되는 것을 특징으로 할 수 있다. The present invention relates to a mold and a method for producing a mold, the method for producing a mold according to the present invention, the first step using any one or more of a silicate or polysiloxane compound as a precursor, and using the alcohol solvent to the precursor with a metal alkoxide compound A second step of mixing and a third step of immersing the mixture in a base material; And, it may be characterized by comprising a fourth step of drying. 주형, 규산염, 폴리실록산 Template, silicate, polysiloxane

Phenolic resin binder for shell mold

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Inorganic-organic composition

BINDERS CONTAINING TITANIC ACID ESTERS FOR COATING MASSES AND REFRACTORY PRODUCTS, AND PROCESS FOR PREPARING SUCH BINDERS

BINDER FOR CERAMIC MOLD SHELLS FOR PRECISION CASTING

Silica sol binder - from ethyl silicate and silica sol for binding refractory aggregates

A binder is made by acidifying ethyl silicate, rendering water compatible therewith, then completing hydrolysis by adding a basic silica sol. The binder, used for refractor aggregates, may be formed from ethyl silicate forming >=28% wt. and 6-50% vol. of the binder; a mixt. of water and a water-miscible solvent, the mixt. forming 20-50% vol. of the binder; a mineral acid sufficient to confer on the binder a final pH 5; and a basic aq. silica sol. contg. 15-45% wt. silica and forming 10-75% vol. of the binder.

Self-curing foundry moulding sand - contg. phenol-aldehyde binder, acid, and phenoxy-alkyl-alkoxy-silane curing agent

Self-curing moulding sand for the prodn. of foundry moulds and cores consists of a foundry sand, a phenol-alde: hyde resin binder, and acid catalyst, and a phenoxy-alkyl-alkoxy-silane curing agent of formula: (where X is H, alkyl, alkoxy or O(CH2)nSi(OR)3 n is 2 or 3; and R is 1-4 C alkyl). The sand cures rapidly, has good mechanical strength in both initial and final stages of curing, and is non-toxic.

Precision casting mold

COMPOSITION TO BE MOLDED AND METHOD OF ITS USE

L'invention concerne une composition à mouler et un procédé de son utilisation. On obtient les compositions à mouler de l'invention par mélange des composants d'une résine de polyuréthanne et d'un granulat (sable), d'un silane et d'oxyde de fer, on moule le mélange sous la forme désirée et on le durcit L'invention s'applique en particulier à la préparation de noyaux et de moules de fonderie. The invention relates to a molding composition and a method of its use. The molding compositions of the invention are obtained by mixing the components of a polyurethane resin and an aggregate (sand), a silane and iron oxide, the mixture is molded into the desired shape and the mixture is formed. hardening The invention applies in particular to the preparation of foundry cores and molds.

REFRACTORY BINDER COMPOSITION AND PROCESS FOR PRODUCING THE SAME

Refractory binder composition and method for obtaining it

L'INVENTION CONCERNE UNE COMPOSITION DE LIANT REFRACTAIRE DESTINEE A LA CONFECTION DE MOULES OU AUTRES DISPOSITIFS REFRACTAIRES. LADITE COMPOSITION COMPREND DE LA SILICE COLLOIDALE, UNE MATIERE LIQUIDE CONTENANT DES GROUPES SI-OH, UN SOLVANT APTE A SOLUBILISER LA MATIERE LIQUIDE ET LA SILICE COLLOIDALE, ET AU MOINS UN COMPOSE ORGANIQUE NON METALLIQUE, NON IONIQUE, APROTIQUE QUI CONTIENT AU MOINS UN ELEMENT CHOISI PARMI A, S, B ET N ET QUI STABILISE LA COMPOSITION A L'ENCONTRE D'UNE AUTO-GELIFICATION, LA COMPOSITION POUVANT ETRE GELIFIEE A LA DEMANDE EN UNE SEULE PHASE. APPLICATION EN PARTICULIER A L'OBTENTION DE PIECES METALLIQUES COULEES.

Bonding agent for inorganic oxidizable material

COMPOSITION AND PROCESS FOR THE MANUFACTURE OF MOLDS AND CORES FOR FOUNDRIES

Material composition and method for its manufacture

A material composition for play or modelling purposes comprises a particulate material (2) and a binder (3) which is disposed as thin layers on the particles. The binder includes a hydroxy-terminated polymer cross-linked by a boron compound, in particular a silicon oil. According to the present invention, the concentration of particles (2) is 90-98 vol% of the finished composition. A method for producing the material composition comprises the steps that the particles (2) are placed in a mixer, that the hydroxyl-terminated polymer, in particular silicon oil, is added and distributed as thin layers on the surfaces of the particles and that thereafter a boron-containing cross-linking agent is added in solution and mixed so that a cross-linking of the polymer takes place and the viscosity increases.

Organic silicates

Mfr. of moulds for casting high melting metals - by forming a graphite compsn. around a water-soluble model

Mfr. comprises (a) mixing graphite particles, ethyl silicate binder mixer or hydrolysed with the equiv. amount of water, and a hardener to a flowable material, which is (b) formed into a mould, (c) dipped into water when semigelled to achieve further hardening, and (d) dried and baked. Method is used esp. for casting of Ti and its alloys, No erosion or gas evolution occurs in contact with the molten metal. The mould has high strength and can simply and cheaply made, with high accuracy. Parts with deep holes and complex shape, which are difficult to make by the lost wax process can be produced.

Organic titanate materials

PROCEDURE FOR THE MANUFACTURE OF NUCLEAR PIPE OF METALS WITH HIGH MELTING POINT

Adhesive for casting and preparation method thereof

本发明公开了一种铸造用酸性乳胶及其制备方法，主要针对钛、锆即其合金铸造领域中的二醋酸锆粘接剂的杂化改性，尤其是针对二醋酸锆粘接剂的回溶性改进，在二醋酸锆粘接剂中加入酸性乳胶、丙烯酸乳液、醋酸乙烯酯乳液对其进行杂化改性，从而提高粘接剂的抗回溶性，消除了在型壳制造过程中的回溶问题，减少了由于型壳回溶造成的表面涂层脱落和表面析出物产生的夹杂缺陷。

Model processing

Aggregate for casting

Process for preparing refractory molded articles and binders therefor

This invention provides a process for preparing a refractory molded article comprising the steps of (a) forming a molded article matrix from an aggregate and the first binder, (b) impregnating the molded article matrix formed in step (a) with the second binder consisting of an alcoholic solution of one kind or two or more kinds of metal alkoxides selected from alkoxides of metals of Group 4A or Group 4B (excepting carbon) and Group 3A or Group 3B of the periodic table and their partial hydrolysates and an alkaline compound of alkali metal or alkaline earth metal (one kind or a mixture of two or more kinds selected from alkoxides, hydroxides and salts of the metal) and (c) drying and firing the molded article matrix at high temperature and also provides a binder for the preparation of such refractory molded article. The invention provides a process for preparing a refractory molded article and a binder with advantages such as casting of a molten metal without generation of gases and prevention of such defects as blow holes, good flow of a molten metal enabling thin-wall casting of steel, reduced requirement of riser in steel casting compared with cold casting, good dimensional precision, wide applicability to materials ranging from light alloy to steel, and an inner part for adjustment of strength and improvement of crumbling characteristics.

Inorganic-organic plastics

Foundry binder systems which contain a silane-modified polyisocyanate

The invention relates to phenolic-urethane foundry binder systems containing a silane-modified polyisocyanate. The silane-modified polyisocyanates are prepared by reacting a polyisocyanate with an organosilane. The foundry binders are used to make foundry shapes, which are used to cast metal parts.

Precision casting mould binder - based on silica organosol diluted with aq. phosphate soln. for increased stability

A precision casting mould based on refractory aggregates is made using a binder which is prepd. by mixing a silica hydrosol, contg. 3-6% SiO2, with an organic liq., and, after separating, recovering an organosol contg. 16-30% SiO2. The organosol is diluted up to approx. 20 vol.% with water contg. is approx. 4% phosphates. The refractory aggregates are bonded by colloidal silicic acid as well as by a phosphate bond during melting of the metal to be cast. A low cost mould with a strong SiO2 organosol bond is mfrd. The mechanical properties and stability are improved. Conventional appts. is used in the prepdn. of the organosol and the mould. It is not necessary to supply any energy nor is there any evolution of pollutants. The sols. are compatible with all the usual refractory materials used in precision casting moulds. Heavier parts can also be cast.

Process for preparing refractory molded articles and binders therefor

본 발명은, (a) 골재와 제1바인더를 결합하여 성형품 소체를 형성하는 공정 ; (b) 주기율표 4A족 또는 탄소를 제외한 4B족 및 3A족 또는 3B족의 금속알콕시드 및 그들의 부분 가수분해물 중에서 선택된 1종 또는 2종 이상의 금속알콕시드류와, 알칼리금속 또는 알칼리도금속의 알칼리화합물을 함유하는 알코올 용액으로 이루어지는 제2바인더를, 전기 공정 (a)에 의해 성형된 성형품 소체에 함침시켜 가수분해시키는 공정 ; (c) 성형품 소체를 건조시켜 고온에서 소성하는 공정으로 이루어짐을 특징으로 하는 내화물 성형품의 제조방법이고, 또 이와 같은 내화물 성형품을 제조하는데 사용되는 내화물 성형룸 바인더이다. The present invention, (a) a step of combining the aggregate and the first binder to form a molded article body; (b) contains one or two or more metal alkoxides selected from metal alkoxides of Groups 4B and 3A or 3B other than Group 4A or carbon of the periodic table and their partial hydrolysates, and alkali compounds of alkali metals or alkali metals A step of impregnating and hydrolyzing a second binder composed of an alcohol solution to be formed into the molded article body formed by the electrical step (a); (c) A method for producing a refractory molded article, which comprises a step of drying a molded article body and firing at high temperature, and a refractory molding room binder used for producing such a refractory molded article. 본 발명에 의하면, 주탕시에 기체 발생이 없고, 기포등의 주조결함을 방지할 수 있고, 또 탕의 흐름이 원활하며, 주강품 등의 살을 얇게 만들 수 있고, 더욱이 상온주조와 비교하여 적은 라이저(riser)로 주강등 등의 주조가 가능하다는 잇점이 있고, 또 양호한 치수정밀도를 얻을 수 있고, 경합금으로부터 주강품에 이르기까지의 주조에 이용할 수 있고, 내심부에 강도를 조절할 수 있고, 붕괴성을 향상시킬 수 있는 내화물 성형품의 제조방법 및 내화물 성형품용 바인더를 제공할 수 있다. According to the present invention, there is no gas generation at the time of pouring, it is possible to prevent casting defects such as bubbles, the flow of the water is smooth, the thickness of cast steel products can be made thin, and the riser is less than that at room temperature casting. (riser) has the advantage that casting such as cast steel can be obtained, and good dimensional accuracy can be obtained, it can be used for casting from light alloy to cast steel, strength can be adjusted to the inner core, The manufacturing method of the refractory molded article which can be improved, and the binder for refractory ...

Binding agent compositions.

Binding agent compositions for inorganic fillers or oxides containing a curable binder such as a hardenable resin, and a ureido-functional organosiiicon compound as described. Foundry sand compositions including binding agent compositions as described, sand and a catalyst for the hardenable resin. Shaped products comprising inorganic oxide particles, e.g., sand, a binding agent composition as described and catalyst for the hardenabie resin wherein the hardenable resin is in its hardened form. Novel ureido-functional organosilicon compounds having two hydrolyzable or hydroxy groups to the molecule and at least one ureido-functionai group in which the ureido group is connected to silicon by means of a group containing at least five carbon atoms.

LAMINATED REFRACTORY COMPOSITION AND METHOD FOR FORMING SAME

L'INVENTION CONCERNE UN PROCEDE DE FORMATION D'UNE COMPOSITION REFRACTAIRE STRATIFIEE SUR UNE SURFACE. LE PROCEDE CONSISTE A APPLIQUER EN ALTERNANCE SUR LA SURFACE UNE COMPOSITION A BASE DE SOL DE SILICE COLLOIDALE BASIQUE ET UNE COMPOSITION A BASE DE LIANT HYBRIDE ACIDE, DE SORTE QUE CHAQUE COUCHE DE L'UNE DES COMPOSITIONS SOIT AU CONTACT D'UNE COUCHE DE L'AUTRE COMPOSITION, ET A SECHER CHAQUE COUCHE APPLIQUEE JUSQU'A CE QU'ELLE ATTEIGNE UNE DURETE SUFFISANTE POUR QUE LES COUCHES APPLIQUEES NE SE SOULEVENT PAS DE LA SURFACE LORS DE L'APPLICATION D'UNE COUCHE SUIVANTE. APPLICATION A LA FABRICATION DE MOULES-CARAPACES POUR LE MOULAGE A MODELE PERDU. THE INVENTION RELATES TO A PROCESS FOR FORMING A REFRACTORY COMPOSITION LAMINATED ON A SURFACE. THE PROCESS CONSISTS OF APPLYING ALTERNATIVELY TO THE SURFACE A COMPOSITION BASED ON BASIC COLLOIDAL SILICA SOL AND A COMPOSITION BASED ON ACIDIC HYBRID BINDER, SO THAT EACH LAYER OF ONE OF THE COMPOSITIONS IS IN CONTACT WITH A LAYER. 'OTHER COMPOSITION, AND DRY EACH COAT APPLIED UNTIL IT REACHES SUFFICIENT HARDNESS SO THAT THE APPLIED COATS DO NOT LIFT FROM THE SURFACE WHEN APPLYING A NEXT COAT. APPLICATION TO THE MANUFACTURE OF SHELL MOLDS FOR LOST MODEL MOLDING.

Resin coated sand for shell mold

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Storage-stable preparations based on aqueous silicic acid solutions

Compositions of matter containing organic silicates

Masses based on hydrocarbon ether polysihcat

Patent PL89580B1

Polyurethane forming no-bake foundry binders

This invention relates to a polyurethane no-bake foundry binder comprising (1) phenolic resin component which comprises (a) a phenolic resin, (b) hydrofluoric acid, and (c) a silane, and (2) an organic polyisocyanate component, and (3) a liquid tertiary amine catalyst component. The binders are used to prepare foundry mixes by mixing the binder with a foundry aggregate. Foundry shapes are prepared with the mixes by the no-bake process and are used to cast metal parts.

N-SUBSTITUTED .beta.-AMINOETHYL SILANES AND SILOXANES

The method of obtaining a binder for the manufacture of ceramic forms

Patent JPS5751434B2

Binding agent system, core sand mixture and a method for producing the same

The invention relates to a binding agent system, based on water glass, consisting of an aqueous alkali-silicate solution with the general composition xSiO2.yM2O.zH2O, with M representing the alkali ions Li+, K+ or Na+ and a hygroscopic base. The ratio Na2O/SiO2 is equal to between 2.5 and 3.5 with a solid content of between 20 and 40 % and caustic soda lye with a concentration of 30 % in an aqueous solution is used as the hygroscopic base. According to the invention, the aqueous alkali-silicate solution consists of a solution in emulsion, containing between 8 and 10 % silicon oil, in relation to the binder quantity, the silicon oil having a boiling point of >/= 250 °C. The binder quantity for a core sand mixture is between 1.0 and 2.5 %, in relation to the total quantity of granular solid matter. The production method takes place in a core shooting machine, comprising a vertically aligned housing with a horizontal air intake. The core sand mixture is introduced into a slotted sand cylinder using a funnel. During the shooting process, the connection between the funnel and the sand cylinder is closed. The core sand mixture in the slotted sand cylinder is compressed using an air pressure of p1 and propelled into the core box using a pressure of p2 > p1.

Improvements to molds intended for metal casting and their manufacturing processes

Cold-box binding agent systems and mixtures for use as additives for such binding agent systems

A mixture is described which can be produced by causing a reaction of a precursor mixture of (av) methanesulfonic acid (bv) one or more esters of one or more phosphorus oxoacids and (cv) one or more silanes. The invention additionally relates to the usage of said mixtures as additives for the polyisocyanate component of a two-component binder system for producing a polyurethane resin. The invention further relates to a solution containing polyisocyanate for usage as a component of a moulding material binder system, to the usage of a solution containing polyisocyanate as the polyisocyanate component of a two-component binder system for producing a polyurethane resin and to corresponding two-component binder systems for producing a polyurethane resin.

Patent FR2205523A1

Process for the production of molds and cores suitable for the manufacture of fiber composite bodies or castings of metal or plastic, mold bases and binders usable in the process and molds and cores produced by the process

Bei einem Verfahren zur Erzeugung von für die Herstellung von Faserverbundkörpern oder Gussteilen aus Metall oder Kunststoff geeigneten Formen und Kernen aus einem partikulären Formgrundstoff und einem mehrkomponentigen Binder mittels 3D-Druck wird der partikuläre Formgrundstoff mit mindestens einer siliziumorganischen Verbindung vorbehandelt, die ein polares hydrophiles Ende und ein unpolares hydrophobes Ende aufweist. Nach Bildung einer Schicht aus dem vorbehandelten partikulären Formgrundstoff wird der Binder oder mindestens eine Komponente des Binders in flüssiger Form auf die Schicht aufgebracht. Die siliziumorganische Verbindung ist in gemäß dem Verfahren hergestellten Formen und Kernen enthalten. Der Formgrundstoff und die siliziumorganische Verbindung können Bestandteil eines zur Durchführung des Verfahrens ausgebildeten Sets sein. In a method for the production of moldings and cores made of a particulate molding material and a multi-component binder by means of 3D printing suitable for the production of fiber composite bodies or castings of metal or plastic, the particulate molding material is pretreated with at least one organosilicon compound having a polar hydrophilic end and has a nonpolar hydrophobic end. After forming a layer of the pretreated particulate molding base, the binder or at least one component of the binder is applied in liquid form to the layer. The organosilicon compound is contained in molds and cores made according to the process. The molding material and the organosilicon compound may be part of a set designed to carry out the method.

Inorganic-organic composition

Inorganic-organic compositions obtained from a mixture of components comprising:

Silicone-based compositions and their applications.

METHOD OF MANUFACTURING FIRE-RESISTANT CERAMIC SHAPED BODIES

Material composition and method for its manufacture

A material composition for play or modelling purposes comprises a particulate material (2) and a binder (3) which is disposed as thin layers on the particles. The binder includes a hydroxy-terminated polymer cross-linked by a boron compound, in particular a silicon oil. According to the present invention, the concentration of particles (2) is 90-98 vol% of the finished composition. A method for producing the material composition comprises the steps that the particles (2) are placed in a mixer, that the hydroxyl-terminated polymer, in particular silicon oil, is added and distributed as thin layers on the surfaces of the particles and that thereafter a boron-containing cross-linking agent is added in solution and mixed so that a cross-linking of the polymer takes place and the viscosity increases.

PROCESS FOR MANUFACTURING PRECISION CASTING FORMS FOR REACTIVE METALS

FOAM CONCRETE

PROCESS FOR THE PREPARATION OF FOUNDRY CORES AND CERAMIC COMPOSITION FOR USE IN CARRYING OUT SAID PROCESS

Resin binders with storable alkyl substituted organo amino silanes as adhesive agents

METHOD FOR THE PREPARATION OF BINDING AGENT FOR POWDERS OF REFRACTORY MATERIALS AND OBTAINED PRODUCT

BETA-AMINOETHYLSILANES N-SUBSTITUTES

Patent FR2187844B1

Method of casting metals

Inorganic-organic plastics

Resin coated sand

A RESIN COATED SAND EXHIBITING LOW DUST LEVELS CONSISTING ESSENTIALLY OF ABOUT 1,000 PARTS OF RESIN COATED SAND, AND FROM ABOUT 0.01 TO ABOUT 1.0 PARTS OF SILICONE FLUID.

Cold-box binding agent systems and mixtures for use as additives for such binding agent systems

A mixture is described which can be produced by causing a reaction of a precursor mixture of (av) methanesulfonic acid (bv) one or more esters of one or more phosphorus oxoacids and (cv) one or more silanes. The invention additionally relates to the usage of said mixtures as additives for the polyisocyanate component of a two-component binder system for producing a polyurethane resin. The invention further relates to a solution containing polyisocyanate for usage as a component of a moulding material binder system, to the usage of a solution containing polyisocyanate as the polyisocyanate component of a two-component binder system for producing a polyurethane resin and to corresponding two-component binder systems for producing a polyurethane resin.

Improvements in or relating to the manufacture of refractory substances

641,187. Mould materials. BIRMINGHAM SMALL ARMS CO., Ltd., LAWRENCE, P. H., RAIT, J. R., and BATES, E. Oct. 17, 1947, No. 27793. [Class 83 (i)] A fired refractory substance, e.g. a mould, produced by the lost-wax processes, is made from moulding sand and highly siliceous clay in a bonding liquid comprising hydrolysed ethyl silicate. The clay should pass a sieve 100 mesh per inch and may contain 80-85 per cent of silica, 10-12 of alumina. The bonding liquid may comprise concentrated tetra-ethyl silicate 500 parts by volume, alcohol 300, water 100 and hydrochloric acid 1. 15 lbs. of sillimanite sand, 10 to 20 oz. of clay and 0 to 3 grams of magnesium oxide may be used with 500-1400 ml. of the bonding liquid and 1400-2300 ml. of water or alcohol or a mixture thereof. Specification 580,058 is referred to.

Patent FR2107640A5

BINDERS CONTAINING TITANIC ACID ESTERS FOR COATING MASSES AND REFRACTORY PRODUCTS, AND PROCESS FOR PREPARING SUCH BINDERS

L'INVENTION CONCERNE DES LIANTS POUR MASSES DE REVETEMENTS, QUI PEUVENT ETRE UTILISES POUR DES MOULES DE FONDERIE. LES NOUVEAUX LIANTS CONTIENNENT DES ESTERS POLYMERES DE L'ACIDE TITANIQUE, CONNUS EN SOI, QUI SONT CHELATES PAR DES AGENTS CHELATANTS. ON UTILISE DE PREFERENCE, EN TANT QU'AGENTS CHELATANTS, DES COMPOSES B-DIOXO. LES AGENTS CHELATANTS SONT CONTENUS DANS LE LIANT EN DES QUANTITES COMPRISES ENTRE 0,2 ET 1 MOL PAR ATOME DE TITANE. LES NOUVEAUX LIANTS PEUVENT ETRE PREPARES D'UNE MANIERE SIMPLE A PARTIR D'ESTERS DE L'ACIDE TITANIQUE, D'EAU ET DE L'AGENT CHELATANT, LA QUANTITE D'EAU ETANT CHOISIE SELON LE DEGRE DE CONDENSATION VOULU DE L'ESTER POLYMERE DE L'ACIDE TITANIQUE. THE INVENTION RELATES TO BINDERS FOR COATING MASSES, WHICH CAN BE USED FOR FOUNDRY MOLDS. THE NEW BINDERS CONTAIN POLYMERIC ESTERS OF TITANIC ACID, KNOWN IN ITSELF, WHICH ARE CHELATED BY CHELATING AGENTS. B-DIOXO COMPOUNDS ARE PREFERABLY USED AS CHELATING AGENTS. THE CHELATING AGENTS ARE CONTAINED IN THE BINDER IN QUANTITIES OF 0.2 TO 1 MOL PER TITANIUM ATOM. THE NEW BINDERS MAY BE PREPARED IN A SIMPLE WAY FROM ESTERS OF TITANIC ACID, WATER AND THE CHELATING AGENT, THE QUANTITY OF WATER BEING CHOSEN ACCORDING TO THE DEGREE OF CONDENSATION WANTED FOR THE POLYMERIC ESTER TITANIC ACID.

PHENOL OR FURANHARPIC BINDING CONTAINING AMINOSILANES AS ADMINISTRATORS

Titanic acid ester-containing binder

Methods for fabricating shapes by use of organometallic, ceramic precursor binders

Organometallic ceramic precursor binders are used to fabricate shaped bodies by different techniques. Exemplary shape making techniques which utilize hardenable, liquid, organometallic, ceramic precursor binders include the fabrication of negatives of parts to be made (e.g., sand molds and sand cores for metalcasting, etc.), as well as utilizing ceramic precursor binders to make shapes directly (e.g., brake shoes, brake pads, clutch parts, grinding wheels, polymer concrete, refractory patches and liners, etc.). A preferred embodiment of the invention involves the fabrication of preforms used in the formation of composite articles.

PROCESS FOR PRODUCING CORES IN PARTICULAR FOR THE CASTING OF HIGH MELTING METALS

BINDERS FOR CERAMIC SHELLS OF PRECISION MOLDS

Process for the production of precision molds

Patent JPS4861324A

Self-curing emulsions

1481715 Polyisocyanate containing phenolic hydroxyl groups BAYER AG 29 Nov 1974 [30 Nov 1973 14 June 1974] 51786/74 Heading C2C [Also in Division C3] Polyisocyanates which contain phenolic hydroxyl groups are prepared by reacting an organic polyisocyanate with a phenol which in addition to at least one phenolic hydroxy group, contains at least one group which is not only reactive with isocyanate groups but has a higher reactivity with isocyanate groups than the phenolic hydroxyl group, the proportions cf the reactants used being such that the reaction mixture contains an at least 200% molar excess of isocyanate groups over the groups which react with them more readily than the phenol group.

Mold and method for its production

Patent RU2017142823A3

Surface treatment method of silica sand for casting sand core ink-jet 3D printing

本发明的目的是提供一种铸造砂型砂芯喷墨3D打印用硅砂的表面处理方法，硅砂在150‑300℃保温2‑3小时进行预处理后，加入占砂重0.2％‑2.0％的有机硅混合液，混合均匀，80℃‑200℃保温0.5‑3小时干燥固化，然后冷却至室温，破碎，筛分，即可使用。使用该方法处理后的硅砂，可用于喷墨3D打印的方式快速制造铸造用的砂型、砂芯。本发明提供的方法对硅砂进行处理之后，硅砂表面形成坚实、抗酸碱、致密的有机膜，可以改善硅砂的表面性能，起到防吸湿、防静电、降低硅砂安息角、降低对呋喃树脂类粘结剂的润湿角等效果，能用于砂型、砂芯喷墨3D打印，达到与进口硅砂相同的技术和使用效果。

Binding agents prepared from resins containing adhesivizing agents of long shelf life

ABSTRACT OF THE DISCLOSURE: The invention relates to a binding agent, for an inorganic oxidic material, comprising an aminosilane and a thermosetting resin, said resin being selected from the group consisting of a phenol-formaldehyde resin and a condensation product of furfuryl alcohol with a urea-formaldehyde pre-condensate, the improvement wherein said aminosilane is selected from the group consisting of a) aminosilanes of the formula wherein n = 1 to 3, m = 0 or 1, p = 0 or 1 and each R represents a C1 to C3 alkyl moiety, and b) aminosilanes of the formula

Substd aluminium alcoholates - and adducts with resins pigments,drying oils and fillers,in coating composns

Foundry mix including resorcinol

A foundry mix includes a major amount of a foundry aggregate and an effective binding amount of a binder system. The binder system cures in the presence of sulfur dioxide and a free radical initiator. The binder system may include (1) 10 to 70 parts by weight of an epoxy novolac resin; (2) 0.5 to 10 parts by weight of resorcinol; (3) 20 to 70 parts by weight of a monomeric or polymeric acrylate; and (4) an effective amount of a free radical initiator. Notably, (1), (2), (3) and (4) are separate components or mixed with another of said components, provided (4) is not mixed with (3), where said parts by weight are based upon 100 parts of the binder system.

Binder for manufacturing precision casting mold

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Hybrid binder having reduced organic solvent content for use in refractory moulds

Disclosed is a fast-curing hybrid binder suitable for use in refractory moulds, which has the advantage of a reduced organic-solvent content. The binder is comprised of two silica sources, viz. colloidal silica and a prehydrolysed organosilicate in the form of a mixture of an alkylpolysilicate and an alkyl or aryl alkoxy silane, preferably selected from the group consisting of C₁₋₆ alkyl trialkoxy silanes, di C₁₋₆ alkyl dialkoxy silanes, phenyl trialkoxy silane, diphenyl dialkoxy silane, and mixtures thereof. Preferably the alkylpolysilicate is prehydrolyzed tetraethyl orthosilicate and the alkoxy silane is methyl triethoxy silane, dimethyl diethoxy silane or a mixture thereof.

SUBSTITUTE ALUMINUM ALCOHOLATES AND THEIR USE AS ADDITIVES FOR COATING COMPOSITIONS

A method for the manufacture of molds, especially to collect metals (Machine-translation by Google Translate, not legally binding)

A method for the manufacture of molds, especially for casting metals, in which a suspension of granular refractory material and a liquid, or a mixture of liquids containing a silica sol capable of forming a gel, is arranged around a mold, then after the gelation that agglomerates the granular material to form an assembly, the model is separated, finally submitting the mold thus obtained to a heat treatment, characterized in that the gelefication time of the sol for a given temperature is adjusted by means of the addition of a buffer solution. (Machine-translation by Google Translate, not legally binding)

Core molding process

Cold-setting, polyurethane bond-forming, mould material binder

Die Erfindung betrifft ein Formstoff-Bindemittelsystem zur Herstellung von Giesserei-Formteilen. Dieses Bindemittelsystem enthält als Komponenten eine Lösung eines phenolhaltigen Polyols mit mindestens zwei OH-Gruppen im Molekül sowie ein Polyisocyanat, ggfs. auch in Form einer Lösung, mit mindestens zwei NCO-Gruppen im Molekül, die miteinander unter Polyurethanbildung zu einem kalthärtenden Bindemittel reagieren. Erfindungsgemäss ist der Polyisocyanat-Komponente noch ein Chlorsilan zugesetzt, das beispielsweise eine oder mehrere Verbindungen aus der Gruppe Trimethylchlorsilan, Dimethyldichlorsilan, Methyltrichlorsilan, Tetrachlorsilan, Diethylchlorsilan, Vinyltrichlorsilan und Diphenyldichlorsilan umfassen kann. Bevorzugt beträgt die zugesetzte Menge 0,01-2 Gew.-%, bezogen auf die Polyisocyanat-Komponente. Mit der Erfindung wird ein einfach und preisgünstig herstellbares Bindemittel geschaffen, welches hohe Anfangsfestigkeiten der Formteile mit guten Sandlebenszeiten der Formstoffmischung verbindet. The invention relates to a molding material binder system for producing foundry moldings. This binder system contains as components a solution of a phenol-containing polyol with at least two OH groups in the molecule and a polyisocyanate, possibly also in the form of a solution, with at least two NCO groups in the molecule, which react with one another to form a cold-curing binder with the formation of polyurethane. According to the invention, a chlorosilane is also added to the polyisocyanate component, which can comprise, for example, one or more compounds from the group trimethylchlorosilane, dimethyldichlorosilane, methyltrichlorosilane, tetrachlorosilane, diethylchlorosilane, vinyltrichlorosilane and diphenyldichlorosilane. The amount added is preferably 0.01-2% by weight, based on the polyisocyanate component. With the invention, a simple and inexpensive to produce binder is created, which combines high initial strength of the molded parts with good sand life of ...

Methods for fabricating shapes by use of organometallic, ceramic precursor binders

This invention relates to the discovery of organometallic ceramic precursor binders used to fabricate shaped bodies by different techniques. Exemplary shape making techniques which utilize hardenable, liquid, organometallic, ceramic precursor binders include the fabrication of negatives of parts to be made (e.g., sand molds and sand cores for metalcasting, etc.), as well as utilizing ceramic precursor binders to make shapes directly (e.g., brake shoes, brake pads, clutch parts, grinding wheels, polymer concrete, refractory patches and liners, etc.). In a preferred embodiment, this invention relates to thermosettable, liquid ceramic precursors which provide suitable-strength sand molds and sand cores at very low binder levels and which, upon exposure to molten metalcasting exhibit low emissions toxicity as a result of their high char yields of ceramic upon exposure to heat.